When you can't authorize a transaction over the Internet (perhaps because you can't access the Internet, or you need an approval for a high dollar amount), you must call the cardholder's bank to get a voice authorization code. To submit a voice authorization code for a credit card transaction:
Tacrolimus (also FK-506 or fujimycin, trade names Prograf, Advagraf, Protopic) is an immunosuppressive drug used mainly after allogeneic organ transplant to lower the risk of organ rejection.
The Test. The tacrolimus test is used to measure the amount of the drug in the blood to determine whether the concentration has reached a therapeutic level and is below the toxic level.It is important to monitor levels of tacrolimus for several reasons:igns and symptoms of tacrolimus toxicity vary according to the type of organ transplant and may include: 1  Kidney damage (nephrotoxicity). 2  Tremors, headache (neurotoxicity). 3  High blood pressure. 4  Nausea and vomiting. 5  Electrolyte disturbances, such as hyperkalemia.